Pump.



. Patented'Sept. VHi, |962.

n. H. YALE.

PUMP.

v (Application filed July 29, 1901.) (No Model.)

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UNITED' "STATES RODNEY H. YALE, OF BEATRICE, NEBRASKA.

PUMP.

SPECIFICATION formingpart of Letters Patent No. 709,288, dated September16, 1902.

Application iiled July 29, 1901.

To all whom, t may concern,.-

Beit known that I, RODNEY H. YALE, a citizen of the United States,residing at Beatrice, in the county of Gage and State ofNebraska, haveinvented new and useful Improvements in Pumps, ol which the following isa specification.

My invention relates to improvements in the construction of pistons forpumps or other similar implements in which a reciprocating piston isarranged to act upon a body of liquid contained within a cylinder,barrel, casing, or other similar inclosingV receptacle for such liquid;and the special object of my improvements is to provide means forautomatically regulating the quantity of liquid which shall be lifted ormoved by the piston in accordance with and proportionately to thequickness or power of the stroke of the reciprocating rod or other meansof operating the piston.

My improvement is especially designed for use in connection withwindmill-pumps or with other motors in which the power is variable orchangeable, the result being that the work performed by the piston ismade automatic to correspond at all ti mes with the power available toeffect it.

In the accompanying drawings, Figure l represents a verticallongitudinal section of a windmill-pump containing a piston constructedaccording to my invention. Fig. 2 is a plan View of one of the plates inthe piston of the pump-cylinder, showing the ports therein. Fig. 3 is anelevation of the pipe forming the central chamber or passage-way throughthe piston.

1 indicates the cylinder or barrel of the pump, which is supposed to besubmerged in the Well or liquid to be pumped, 2 and 3 the threaded capsto which the discharge-pipe l and inlet-strainer 5 are respectivelyconnected, and 6 the usual check-valve in the bottom of the cylinder.

7 indicates the lower end of the reciprocating pump-rod leading up tothe Windmill or other source of power. To the lower end of the pump-rodis secured the cylindrical pipe i or valve-chamber 8, provided near itsupper end with perforations or openings 9 in its side wall to permit thepassage of liquid and at i the bottom with a removable cap 10, also hav-Serial No. 70,139. (No modeld` ing suitable openings for the samepurpose. Upon said pipe S as a center and support are arranged the usualparts of a pump-pistonviz., upper and lower plates 11 12, drilled withholes 13, as shown in Fig. 2, to permit free passage of liquid, thecupped pistonleather 14 lying between them and the valve 15 covering theports in plates 11 and 12. Within the passage-way or valve-chamber 8 isformed the circular valve-seat 16, within which is loosely mounted theregulating-valve 17, having a head of slightly-less diameter than thatof the valve-chamber 8 and a tapering stem extending downward throughthe valve-seat and bearing at its lower end against a ret-arding-spring1S, interposed between it and the cap 10 in such a manner that the headof said Valve 17 will be held normally elevated somewhat above thevalveseat. It will be seen that if the valve 17 descends from suchnormal position the space between it and the valve-seat 16, forming apassage-way for the liquid, will gradually become more restricted, andwhen the head rests on the seat said passage-way will be entirelyclosed. The removable cap 10 permits the adjustment of the spring andvalve in such normal positions as may be desired, so that a greater orless force will be required to close the valve.

i The apparatus described, aside from the valve-chamber and itscontents, is essentially an ordinary pump-cylinder ofthe singleactingreciprocating type submerged in the liquid to be pumped, and theoperation of the parts will therefore need to be explained only in sofar as it is aected by the special features of construction hereinreferred to.

It is to be understood that the valve-chamloer 8 is constantly filledwith liquid admitted through the described openings in the top andbottom of said chamber and free to pass through said chamber from oneside of the piston to the other unless prevented by the closing of thevalve. The piston being at the bottom of the cylinder, as in Fig. 1, ifits upward stroke is made quickly the valve 17 will be instantly forcedto its seat against4 the stress of spring 18, and the passagefway beingthus entirely closed the piston will carry its full load of liquid andwill discharge at the pump-spout an amount of liquid equal to IOO thefull capacity of cylinder 1 from the starting-point of the piston to thelimit of its upward movement. If, however, the upward stroke is madevery slowly, the pressure on the valve will not be sufficient toovercome the stress of spring`18, the valve will remain open to itsfullest extent, and the quantity of liquid discharged will be lessenedby the amount passed downward under valve 17 dur-- ing the stroke. Ifthe stroke is made at medium speed, a proportionate quantit)1 of liquidwill pass-the valve, the quantity so passed depending partly on thespeed of the piston movement and partly on the degree of stress ofspring 18 against the valve.

It has been stated that the quantity of liquid passing the valve, andconsequently the quantity delivered at the pump-spout, depends partly onthe speed of the piston; and it is to be observed that when there is afixed length of stroke and a variation in piston speed an automaticresult will be obtained, even if valve 17 be held permanently open or inany fixed position or omitted altogether, provided that a passage-way ofsuitable proportions is maintained through or around the piston topermit the passage of liquid from the side of the piston where it isbeing subjected to pressure-that is, the side between the piston and thespout, or, in other words, the loaded side-to the opposite side or toany part of the apparatus where the pressure is less or merely nominalor entirely absent. Opportunity is thus given to the loaded piston torelieve itself when the speed and power of the motor are diminished, andthus the work to be done is made to some extent proportionate to theavailable power, even without the valve. The preferred form of mydevice, however, includes the valve and spring in some form, thus givinggreater facility of adjustment to varying conditions, as Well asproviding for complete closure of the valve when circumstancesv requireit.

It is obvious that the details of the valve and the means of retardingit may vary considerably without departing from the spirit and principleof my invention, the essential aim of which is to provide a passage-wayleading out of the cylinder through or around the piston, preferablycontrolled by a valve and spring, whereby liquid may be passedautomatically from the pressure side of the piston to the opposite sideduring the working stroke.

I have shown my device as applied to a windmill-pump; but it is ofcourse applicable to pumps operated by any motive power, also to anymachine or device in which a reciprocating piston is arranged to lift ormove a press against and move the piston, thus actuating mechanismconnected with the outer end of the piston-rod. In such case as in thatherein described sudden or strong pressure against the piston closes thevalved passage- Way and secures the full working effect of the impact ofthe liquid against the piston, while under moderate pressure the effectis lessened.

Having described my invention, I claim as new and desire to secure byLetters Patent- 1. In a pump for moving liquids, the combination of apiston-chamber, a reciprocating piston therein adapted to move theliquid, a

` passage-way extending through the piston, a

valve con trolling said passageway,aud means for holding said valve openagainst the pressure of the liquid during the working stroke of thepiston when said pressure is relatively light, and permitting it toclose during said stroke when said pressure is heavier, substantially asset forth.

2. In a reciprocating pump, a piston-chamber and a piston workingtherein, a tube eX- tending longitudinally from one side of said pistouto the other, said tube having an opening at each end, a valve-seatwithin said tube between said openings, a valve adapted to en- 95 gagesaid seat, and aspring adapted to hold said valve open against thepressure of the liquid during the working stroke of the piston when saidpressure is relatively light, and permitting it to close during saidstroke when loo said pressure is heavier, substantially as set forth.

3. In a pump, a cylinder and a piston working therein, said pistoncomprising a central tube carried by the piston-rod, having open- :o5ings at the top and bottom for the passage of liquid, andhaving theusual piston-plates and valve mounted thereon, a valve-seat within saidtube, between said openings, and a valve having a head adapted to engagesaid Irc seat and a tapering stem extending through the seat and bearingagainst a spring tending to hold said valve normally open, substantiallyas set forth.

In testimony whereof I affix my signature 115 in presence of twowitnesses.

RODNEY H. YALE.

Witnesses:

HENRY M. HILL, A. W. KING.

